A) Simplified structural map of Languedoc and southern Rhône valley (SE France) (after Séranne et al., 2021; Mauffret and Gorini, 1996): the grey shaded areas indicate late Eocene to Aquitanian deposits (after Séranne et al., 1995; Séranne et al., 2021) and the background map displays the Bouguer anomaly (after Arthaud et al., 1981). B) Geological map of the Comps and Butte Iouton area, modified from the BRGM geological map, Nîmes sheet 1/50000 (Ménillet, 1973): the map shows the Eocene to Miocene outcrops and the Cretaceous substratum of the Jonquières high. C) Detailed geological map displaying the close-up view of the box around the butte Iouton hill in B).